Northstar Engines and System Technical Discussion Discussion, Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know in Cadillac Engine Discussion; Here is the Definitive Northstar Headgasket Thread. Please choose your year of Cadillac and state if you have had a ...

Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know

Here is the Definitive Northstar Headgasket Thread. Please choose your year of Cadillac and state if you have had a headgasket problem with your Seville or Eldorado and what mileage it occured at. If you have never had a problem please do not participate in the poll!

Re: Definitive Northstar Headgasket Thread

My 99 went bad I think due to not changing the coolant on time. Anyway the gaskets went bad and the rings also so the motor was pretty much a total loss. For the eight grand it would have cost to fix I got a much nicer car my current 2000 STS. The deciding factor for me though was not the motor but the lighter interrior on the 2000 and the black interrior of the 99 was burning my A$$ in the summer.